Antibuzzing device for telephones.



PATENTBD JULY 9, 1907v 'A. SGHAFFER.

ANTIBUZZING DEVICE FOR TELBPHONES.

APPLICATION FILED DEO.24,1906.

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wwwtoz Jayme-i Sal/a1)??? UNITED STATES PATENT OFFICE.

AUGUST SGI'IAFFER, OF EAST COLUMBUS, OHIO.

Specification of Letters Patent.

Patented July 9, 1907.

Application filed December 24,1906. Serial No. 349,328.

To all whom it may concern:

Be it known that I, AUG Us'r ScI-IArrnn, a citizen of the United States,residing at East Columbus, in the county of Franklin and State of Ohio,have invented a certain new and useful Improvement in Antibuzzing Devicefor Telephones, of which the iollowing is a specification.

The object of this invention is to provide a simple, cheap and effectivedevice for eliminating buzzing in telephone receivers.

In my invention I provide, as will be hereinafter fully explained, adevice that can be easily and promptly interposed between the diaphragmand cap ring or car piece of the receiver, said device operating todeaden, absorb or prevent the creation or transmission of such noises tothe ear of the user.

The invention consists in the construction hereinafter described andclaimed.

In the accompanying drawings in which I have illustrated an embodimentof the invention-Figure 1 is an edge view of the wire netting or screenpiece; Fig. 2 is a plan view of the same; Fig. 3 is an edge view of anannulus that may be employed in the construction; Fig. 4 is a plan viewof the same; Figs. 5 and 6 are edge and sectional views respectively ofthe concave-convex disk; Fig. 7 is a plan view of the same; Fig. 8 is anedge view of the several parts assembled and bound together; Fig. 9 is aplan view of the same; Fig. 10 is a view ofa fraction of an ordinarytelephone receiver showing my device applied thereto, the cap ring orcar piece being in diametrical section, the parts in this view being ona larger scale than in the other views.

The parts of the anti-buzzing device, as above referred to and as shown,are all of circular form and of substantially the same diameter to adaptthem to the form ol receiver at present in common use, but I know of noreason why they could not be modified in this respect if the form of thereceiver required it. The screen part 11 of the device comprises a flatpiece of woven metal, preferably steel wire, netting, with a disk 11 ofpreferably waxed paper of equal diameter pasted or glued to one side ofit. The paper member of the screen piece is coated in its center, aswithin the circle ll preferably with a thick enamel paint or shellac. l2designates an annulus preferably of mica, although it might be of metal,paper or other material. 13 designates the concave-convex piece. Thislast named piece is preferably of metal, for examplesaluminium or steel.This concave-convex piece is covered on both sides, as seen at l3 and13, with ordinary paperwrapping paper will do pasted or glued thereto.of this (lisk is coated in its center, as within the circle 3, with athick enamel paint or shellac. These separate parts, as above described,are all assembled together or superposed on each other in the order inwhich they are shown and as seen in Figs. 8 and I0; and for conveniencein handling the parts are bound together at the edges. Small metallicclips 14 secured at different points around the edge of the assembledparts will suffice for this last named purpose. The device as thusconstructed is clamped in the telephone receiver between the cap ring orcar piece 15 and the body or handle piece 115 with the wire nettingpiece lying next the diaphragm of the receiver.

Various modifications in the construction thus shown and described canbe made but the best results I believe are attained with constructionsas precisely described.

The annulus shown in Figs. 3 and 4 can be entirely omitted but, asbefore indicated, better results are had when it is included.

I have found by many trials and tests that my device eliminates entirelyor largely relieves the buzzing commonly observed by users of telephonereceivers, but I am not at present prepared to explain why the deviceeffects this result.

What I claim and desire to secure by Letters Pat ent is:

1. An anti-buzzing device for telephone receivers coinprisingessentially in combination, a wire screen, a washerlike device, and aconcavo convex piece, adapted to he placed together and secured in theear piece of the receiver.

2. An anti-buzzing device for telephone receivers con1 prisingessentially in combination, a wire screen, and a concave-convex piece,adapted to be placed together and sc cured in the ear piece of thereceiver.

3. An untthuzzing device for telephone receivers com prising incombination, a woven wire screen and a paper covering added thereto.

4. In an anti huzzing device for telephone receivers, 11 wire screen anda paper covering therefor having a painted or shellackcd centralportion.

In an anti-buzzing device for telephone receivers, the combination of awire screen and a concave-convex piece having a paper covering addedthereto.

6. In an anti-buzzing device for telephone receivers. the combination ofa wire screen and a concavo convcx piece having a paper covering addedthereto on both sides.

1. In an anti-buzzing device for telephone receivers. the

combination of a wire screen and a concave-convex disk The convex sideof the paper covering having a paper covering added thereto, said papercovering i 10. An anti'buzzing device comprising in combination, a

having a painted or shellacked center. wire screen and a metallic disksuperposed one with refer- S. In an anti-buzzing device for telephonereceivers, the enee to the otherv combination of a wire screen, and aeoncavoconvex piece 11. An anti-bnzzing device comprising incombination, a

superposed with reference to each other, and means for metallic plate, arine,- or washer, and a wire screen.

holding them together. AUGUST SUHAFI IGIL 0. An antibuzzing; devicecomprising in combination, a Witnesses:

metallic disk, a wire screen, and a paper covering added ALICE B. Coon,

thereto. I BENJAMIN Fl NoKnL.

